"Anyone can browse the marketplace, but to buy and download all you need to do is sign in with your Windows Live ID. The Games for Windows Marketplace integrates with Xbox LIVE so if someone signs in with the same Windows Live ID they use for Xbox LIVE, the Games for Windows Marketplace will display their Gamerscore and Xbox LIVE avatar at the top right."

Microsoft has over 100 game titles in the marketplace from the likes of Capcom, 2K Games, Square Enix, Activision and others.

Each publisher has its own bespoke Games for Windows Marketplace page for their games and news. Check out Activision's page for an example of how this is going to work.